On May 4, 1993, the Governments of Vietnam and Hungary signed an agreement to exempt citizens holding diplomatic and official passports from visa requirements. The agreement became effective on August 1, 1993:
Agreement between Vietnam and France regarding visa exemption for short stays on a reciprocal basis for diplomatic passport holders. Signed on October 6, 2004, and effective from July 1, 2005.
On March 31, 2011, the Vietnamese and Salvadoran governments signed an agreement allowing visa exemption for diplomatic and official passport holders. The agreement became effective on May 30, 2011.
